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Performance assessment of bi-scalar beamformers in practical phased array feed systems

S. J. Wijnholds ; W. van Cappellen ; Marianna Ivashina (Institutionen för rymd- och geovetenskap, Avancerad mottagarutveckling)
30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, Istanbul, 13-20 August 2011 (2011)
[Konferensbidrag, refereegranskat]

We assess the sensitivity and polarimetric performance of a polarimetric phased array feed (PAF) system in which the two sets of nominally orthogonally polarized elements are beamformed separately. Out simulations of an actual PAF system indicate that such bi-scalar instead of full-polarimetric beamforming results in about 4% sensitivity loss and an XPD of about 45 dB. Our measurements confirm the sensitivity loss, but indicate worse polarimetric performance than the simulations. We indicate how the performance of a PAF system with bi-scalar beamforming can be improved by beamforming of the cross-polarization signals and polarimetric corrections to the beamformer outputs.

Denna post skapades 2011-12-29.
CPL Pubid: 151160


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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Avancerad mottagarutveckling


Elektroteknik och elektronik

Chalmers infrastruktur